<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>
<h3><a href="index.html">返回首页</a></h3>

<form action="login" method="post">
    Username:<input type="text" name="username"></br>
    password:<input type="password" name="password"></br>
    <input type="submit">
</form>
</body>
</html>